Applied Materials Today
·
2025
·
IF 6.9
Zheng Yue Wang,Yuyang Cao,Lanyue Zhang,Ze Ping Zhang,Min Zhi Rong,Ming Qiu Zhang
Antifouling coatings, which have important value for submerged marine structures, are faced with the challenge of inherent conflicting property requirements, i.e. the topcoat is desirable to prevent adherence of marine organisms and the basecoat should be able to maximize bonding to the substrate. Besides, the existing antifouling coatings have other tricky problems, like easy depletion of liquid lubricant of slippery liquid-infused porous surface and poor static microbes resistance of hydrophobic surface. Herein, a facile solution is proposed using the newly developed reversibly interlocked polymer networks, which enables temporally and spatially controllable multiple antifouling actions. Aided by dynamic covalent chemistry, the immiscible crosslinked polymers carrying various components with unique functionalities are uniformly interweaved producing a novel non-sticky/sticky antifouling composite coating (NSCC). Consequently, a series of non-contact and contact antifouling strategies based on physical and chemical interactions are seamlessly combined with high cohesion and interfacial adhesion. Either the surface or the subsurface of the NSCC exhibits excellent resistance to protein and bacteria under both static and dynamic conditions. The properties of the NSCC comprehensively outperform those of the analogues reported in the literatures. From a practical perspective, the redundancy design has set up a novel paradigm for preparing long-lasting antifouling coating.
CAS / MDL:
研究领域:
材料科学
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海洋生物学
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表面化学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Saiyin Hou,Dong Lv,Yinghan Li,Zonglin Li,Mengmeng Liu,Xinhong Yu,Yanchun Han
Wearable dry electrodes are the foundation for the development of long-term, real-time biopotential monitoring devices. However, the physiological signals collected by common electrodes often accompany high noise and motion artifacts due to difficulties in conforming to skin deformations and poor contact between electrodes and skin. In contrast to them, PEDOT:PSS-based dry electrodes become a promising material with adjustable stretchability, conductivity, and adhesion properties to achieve high-quality signal delivery. Herein, we report a highly stretchable self-adhesive film prepared by the conductive polymers PEDOT:PSS, ethylene glycol (EG), poly(vinyl alcohol) (PVA), and d-sorbitol (SOR). In the blending system, SOR will disrupt the dense hydrogen bond interactions within PVA and PSS chains, while PEDOT:PSS/PVA physically cross-linked networks can dissipate strain energy, providing toughness to the films. In addition, the hydroxyl groups on the surface enable the film to be self-adhesive by forming hydrogen bonds with the N and O atoms of the skin stratum corneum. The blended electrode exhibits a conductivity of 200 S/cm and an elongation at break of 120%. Moreover, the electrical properties are still maintained after cyclic stretching (R/R0 ≈ 1.09). The maximum adhesion force of the film on glass and skin is 1.20 and 0.36 N/cm, respectively. The electrode has good biocompatibility, and its excellent stretchability and adhesiveness are conducive to comply with the skin deformation under different conditions. The contact impedance between dry electrodes and skin is only 77 kΩ cm2, which ensures the accurate monitoring of physiological signals including electromyogram (EMG) and electrocardiogram (ECG) during rest or exercise. The signal quality is significantly higher than that of standard Ag/AgCl electrodes. This highly stretchable self-adhesive dry electrode provides a feasible idea for the research of next-generation health monitoring devices.
研究领域:
生物医学工程
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材料科学
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产品关联
DOI
高影响因子
Micromachines
·
2022
·Vol. 14
·期 1
·45
·
IF 3.523
Zhou Lan,Yangcheng Lu
The combination of microstructural units is an effective strategy to improve the micromixing of liquid phase systems, especially viscous systems. However, how the microstructural combination influences micromixing is still not systematically investigated. In this work, the Villermaux/Dushman reaction is used to study the micromixing performance of the viscous system of the glycerol–water in the combination of a T-type micromixer and a micropacked bed. Micromixing performances under various structural parameters and fluid characteristics are determined and summarized, and the micromixing laws are revealed by dimensionless analysis considering the specific spatial characteristics and temporal sequence in the combined microstructures. It achieves good agreement with experimental results and enables guidance for the design and scaling-up of the combined T-type micromixer and micropacked bed towards micromixing intensification in viscous reaction systems.Keywords:micromixing;micropacked bed;microstructual combination;viscous system
研究领域:
化学工程
·
流体力学
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产品关联
DOI
PubMed
高影响因子
RARE METALS
·
2023
·Vol. 42
·期 4
·1261-1273
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IF 8.8
Li Yang,Tang Ming-Yang,Zhang Zhong-Gang,Li Qi,Li Jing-Lei,Xu Zhuo,Liu Gang,Li Fei
BaTiO 3 ceramics are difficult to withstand high electric fields, so the energy storage density is relatively low, inhabiting their applications for miniaturized and lightweight power electronic devices. To address this issue, we added Sr 0.7 Bi 0.2 TiO 3 (SBT) into BaTiO 3 (BT) to destroy the long-range ferroelectric domains. Ca 2+ was introduced into BT-SBT in the form of CaTiO 3 (CT), which has the effect of inhibiting the movement of A-site defects to reduce dielectric loss and refining the grains to increase the breakdown field strength. In addition, we have increased the density and grain uniformity of ceramics by repeated rolling of the green samples through the viscous polymer processing (VPP), to further increase the breakdown electric field. The BT-SBT-CT ceramics exhibit the high recoverable energy storage density of 4.0 J·cm −3 under electric field of 480 kV·cm −1 . Its recoverable energy storage density varies by less than 8% in the temperature range of 30–150 °C, indicating good temperature stability of the energy storage performance. In this work, the energy storage performance of barium titanate-based ceramics was greatly improved by transforming ferroelectrics into relaxor ferroelectrics and VPP method, which can bring new inspiration for the research of energy storage ceramics. Graphical abstract
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Peihe Wang,Hongyan Ding,Xiaofeng Li,Yangchengyi Liu,Yi Sun,Yujing Li,Guozhuang Xu,Shangda Chen,Xiufeng Wang
The slippage of moisture-sensitive materials from substrates during bending or stretching is a common issue that causes baseline drift and even failure of the flexible humidity sensors, which are essential components of wearable electronic devices. In this study, we report a stretchable, self-adhesive, and transparent humidity-sensing electronic patch comprising liquid metal particle electrodes with a stretchable serpentine structure and a humidity-sensing layer made of Ti3C2Tx MXene/carboxymethyl cellulose. This patch is constructed on a soft–hard integrated heterostructure substrate and demonstrates stable humidity-sensitive response performance at 100% tensile strain, along with autonomous adhesion to human skin. Additionally, it exhibits maximum response (1145.4%) at 90% relative humidity (RH), fast response and recovery time (1.4/5.9 s), elevated sensitivity (64.63%/% RH), and preserved humidity sensing under deformation, as well as easy scalability for multiplexed detection. We further illustrate the patch’s potential applications in healthcare and environmental monitoring through a non-contact security door control system and wind monitor system. Our proposed strain-isolation strategy can be extended to other rigid conductive materials and stretchable substrates, providing a feasible mechanism for producing stretchable electronic skin patches.
研究领域:
材料科学
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柔性电子
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Xiaoyu Shi,Kai Wang,Shishuai Gao,Daihui Zhang,Chenhuan Lai,Can Jin,Mi Li,Chunpeng Wang,Qiang Yong,Fuxiang Chu
As lignin is one of the most abundant renewable resources, utilization to fabricate functional hydrogels has gained increasing attention. However, the heterogeneous structure and the few available functional groups of lignin limited its applications. Herein, we presented a simple strategy to synthesize gallic acid (GA)-modified lignin as a key component to prepare conductive hydrogels. The addition of GA during the organic solvent pretreatment of poplar changed the structure of lignin and increased the total content of phenolic hydroxyl groups from 3.20 to 3.89 mmol/g (EOL-G30). Moreover, the enzymatic hydrolysis of pretreated poplar was enhanced from 49.1 to 55.2% (OP-G30) at a low enzyme loading of 5 FPU/g. When using GA-modified lignin to prepare hydrogels, the resulting hydrogel exhibited excellent self-adhesion to various substrates and demonstrated effective free radical scavenging capabilities. When incorporating sodium chloride (NaCl) as conductive ions, the hydrogels exhibit reliable strain-sensing capability. Moreover, they also displayed robust functionality in a low-temperature environment (−20 °C). This study has presented valuable insights to realize in situ modification of lignin and fabricate lignin-based functional materials, offering new perspectives for the biorefinery industry.
研究领域:
材料科学
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生物化学
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可再生资源工程
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产品关联
DOI
高影响因子
Cell Reports Physical Science
·
2021
·
IF 0
Jiahui Bai,Ran Wang,Xiaoming Wang,Shide Liu,Xinliang Wang,Jinming Ma,Zhihui Qin,Tifeng Jiao
Ion-conductive hydrogels combining high-performance mechanical properties, high conductivity, and self-adhesion are ideal for iontronic sensors, but their fabrication remains a challenge. Here, we present a transparent and highly ion-conductive hydrogel that integrates high strength, stretchability, and self-adhesiveness for iontronic sensors. The hydrogel is prepared by introducing biomineral calcium ions into a polyacrylamide-sodium carboxymethyl cellulose (PAM–CMC) crosslinked network. The presence of Ca 2+ not only induces the formation of dynamic crosslinked structure, endowing the hydrogel with notable mechanical properties (maximum strain of 1,480% and stress of 276 kPa), but also results in high ion conductivity (1.4 S·m −1 ). The hydrogel also exhibits strong adhesion with various substrates. Fabricated hydrogel-based sensors are highly sensitive to strain and stress changes with wide sensing ranges and can be used to detect complex human activities.
研究领域:
材料科学
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生物医学工程
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DOI
Biomaterials Advances
·
2024
·
IF 5.5
Junfang Chang,Weijun Wu,Ranran Wu,Zhiyong Guo,Sui Wang,Jie Mao
The flexible surface and chemical compatibility of hydrogels render them particularly appealing for research and development in antibacterial materials. However, designing tough hydrogels with multiple antibacterial mechanisms simultaneously remains a challenge. Inspired by the human skin, a hydrogel with bacterial antifouling, detection, and inactivation functions has been prepared using zwitterionic [2-(methylacrylyl) ethyl] dimethyl-(3-propyl sulfonate) ammonium hydroxide (SBMA) as the matrix and cadmium telluride quantum dots functionalised with cysteamine (CA-CdTe QDs) as the filler through micelle copolymerisation technology, achieving the integration of multiple antimicrobial mechanisms. The experimental analysis demonstrated that the SBMA/CA-CdTe/Micelle (SCM) hydrogel exhibited antibacterial activity against both Gram-negative bacteria ( Escherichia coli ) and Gram-positive bacteria ( Staphylococcus aureus ), proving its excellent broad-spectrum antibacterial properties. Introducing micelles imparts excellent hydrophilicity, stability, and mechanical properties to the SCM hydrogel. Moreover, the SCM hydrogels possess significant self-adhesive properties, enabling them to function as biomimetic skin that tightly adheres to target surfaces, protecting them from bacterial contamination. In addition, the SCM hydrogel biomimetic skin exhibits good electrical conductivity and biocompatibility, capable of converting the motion amplitude of human activity into stable electrical signals, suggesting potential for human motion sensing applications. Overall, the SCM hydrogel biomimetic skin designed in this work, as a multifunctional antibacterial platform, effectively reduces bacterial contamination and holds significant application potential in healthcare and life sciences.
研究领域:
材料科学
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生物医学工程
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微生物学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Lihui Zhao,Banxin Luo,Shishuai Gao,Yupeng Liu,Chenhuan Lai,Daihui Zhang,Wenxian Guan,Chunpeng Wang,Fuxiang Chu
Conductive hydrogels have recently gained impressive attention in flexible sensing. However, their low sensing limit and poor interface matching have raised great concern during the practical application. Therefore, incorporating excellent stretchability and adhesiveness into conductive hydrogel is highly desirable but still be a huge challenge. In this study, we synthesized composite hydrogels with desired properties by utilizing the synergistic role of hemicellulose (HC) and conductive two-dimensional material MXene. As a result, the synthesized hydrogels showed good self-adhesion (3.12 KPa on the skin), great stretchability (>1700 %), and satisfactory electrical conductivity. These multifunctional hydrogels operated as adaptable sensors, adeptly capturing the nuanced signals emanating from an array of human motions. They exhibited an expansive strain tolerance, swift reactivity, and an enhanced acuity in detecting even the slightest deformations (GF = 2.1). Our research provides new insights for creating stretchable, self-adhesive, and functional hydrogels for sensing applications.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
POLYMER
·
2020
·
IF 4.231
Yi Wang,Guanghui Gao,Xiuyan Ren
Hydrogels flexible wearable sensors have gained widespread attention. However, there was a great challenge to prepare the flexible hydrogel sensor with rapid response, wide strain monitoring ranges, great sensitivity and self-adhesion. Therefore, the greatly sensitive and rapidly responsive strain sensor with wide monitoring range and self-adhesion was prepared by introducing sodium caseinate (SC) and reduced graphene oxide (rGO) into the polyacrylamide hydrogel due to ions and electrons provide two different ways of conducting electricity. Casein not only imparted excellent adhesion to the hydrogel, but also provided a good ionic conductive pathway. In addition, the introduction of rGO could offer an electronic pathway. Therefore, the obtained hydrogel exhibited excellent rapid response (190 ms), high sensitivity (Gauge factor, GF = 13.14) and wide strain monitoring range (0.1–1100%). As a result, SC/rGO/PAAm hydrogels could detect sensitive locomotor signals (for example speaking) and large-scale mankind movements for example knee bending). It was believed that the ion and electron conduction would provide a new mechanism to preparing greatly sensitive hydrogel strain sensor.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Science Advances
·
2023
·Vol. 9
·期 36
·
IF 13.6
Ziyang Cheng,Chuxin Li,Can Gao,Chengqi Zhang,Lei Jiang,Zhichao Dong
Liquid entrainment with a solid architecture passing through the fluid-fluid interface is ubiquitous and widely used in industrial processes as a liquid transfer method. Besides liquid properties, solid structures play a core role in entrainment. Although the influence of its macroscopic curvatures and microscale roughness has attracted years of research, the effect and potential of the commonly seen millimetric structures have not been sufficiently explored and exploited. Here, we demonstrate enhanced liquid entrainment on the millimetric structured surface by the co-effect of viscosity and capillarity for sustained liquid transfer of small deviation, including high-quantity uptake and practically operational drainage with small and relatively uniform droplet dripping time of varied liquid viscosities. With the overall process of viscous-capillary entrainment, we achieve stable cyclical arrayed liquid transport, showing its potential for sustained liquid transfer in intractable situations in laboratory, industry, and even daily life.
研究领域:
流体力学
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材料科学
·
仿生工程
·
微流控技术
·
表面工程
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DOI
高影响因子
Scientific Reports
·
2016
·Vol. 6
·期 1
·1-8
·
IF 5.228
Kong Tiantian,Li Jingmei,Liu Zhou,Zhou Zhuolong,Ng Peter Hon Yu,Wang Liqiu,Shum Ho Cheung
The control for the processing of precursor liquids determines whether the properties and functions of the final material product can be engineered. An inherent challenge of processing viscous liquids arises from their large resistance to deform. Here, we report on the discovery of an electric approach that can significantly contribute to address this challenge. The applied electric force can induce a straight viscous jet to coil and the resulting coiling characteristics are governed by the electric stress. We demonstrate the promising use of electrical coiling in the rapid and efficient mixing of viscous liquids. Remarkably, the degree of mixing can be precisely adjusted by tuning the applied electric stress. Our approach of controlling the coiling electrically has important implications on applications such as dispensing and printing of resins, printing patterned surfaces and scaffolds, processing of food and generating non-woven fabrics.
研究领域:
材料科学
·
流体力学
·
工程学
✓ 已验证
DOI
PubMed
高影响因子
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